Adjustable drawing-table.



0. 0. WHEELER.

. ADJUSTABLE DRAWING TABLE.

APPLICATION HLED MAY 2. I917.

Patented Mar. 5, 1918. 3 SHEETS-SHEET l --1, HH I J H M .H-w .Hw1 U- Ui: -1 w]:

vewfoz 0. (1. WHEELER. ADJUSTABLE DRAWING TABLE. APPLICATION mm MAY 2.1917.

Patented Mar. 5,1918.

3 SHEETSSHEET 3.

0 0 fiC (G 7" (inventor OTIS 0. WHEELER, 0}? CHIPPEWA. FALLS, WISCONSIN.

ADJUSTABLE DRAWING-TABLE.

Specification of Letters Patent.

Patented Mar. 5, 1918.

Application filed May 2, 1917. Serial No. 165,897.

To all whom it may concern:

Be it known that I, OTIS O. l/VrmnLea, a citizen of the United States,and resident of Chippewa Falls, in the county of Chip pewa and State ofWisconsin, have invented certain new and useful Improvements inAdjustable Drawing-'lables, of which the following is a specification.

This invention relates to otlice and school furniture and has moreespecial reference to an improved drawing table.

The invention has for its dominant object to provide a drawing table,the top of which can be adjusted vertically and to different angles,thereby enabling the user to arrange work upon the same in a manner tofacilitate preparation thereof.

it is also an object of the invention to provide means whereby theforward or rear sides of the table top may be adjusted vertically orboth sides may be adjusted collec tively.

Among other aims and objects of the invention may be recited, theprovision of an article of furniture of the character men tioned with aview to compactness, and in which the number of parts are compa tivelyfew, the construction simple, the cost of production small andefficiency and operation high.

Other objects will be in part obvious in part pointed out hereinafter.

The invention accordingly consists in the features of construction,combination of ele ments and arrangement of parts which will beexemplified in the construction hereinafter set forth and the scope ofthe application of which will be indicated in the following claims.

In the accompanying drawings, wherein is shown one of various possibleembodiments of my invention,

Figure 1 is a top plan of the improved table having one portion of itstop broken away;

Fig. 2 is a side elevation thereof with a portion of the table topbroken away;

Fig. 3 is an end elevation with a portion of the side wall of the tablebroken away; and

Fig. 4 is a detail in section of the adjusting means locking device.

Similar characters of reference designate corresponding parts throughoutthe several and views of the drawings.

Referring now more specifically to the drawings, there is provided abase or body portion designated in. its entirety by the numeral l. andcomprising a four walled structure, having formed in certain of itswalls, a plurality of drawer receiving shelves whereby d 'awersindicated by the numeral 2 may be slid thereinto. A second compartmentis formed within the body or base portion of the desk and is normallyclosed by means of a hinged door 3, the same serving as an etlicientcompartment for receiving drawing boards and the like. A suitableopening is formed within the rear wall of the desk face and has arrangedtherein a hinged case l having a plurality of pockets formed therein bythe arranging of partitions, whereby large drawings can be convenientlyplaced or filed therein. It is to be understood, that the variousdrawers 2 serve as means for receiving the instruments of the user andfor receiving the smaller sheets or drawings, etc.

A partition 5 is arranged within the desk base 1 preferably intermediateits ends and serves not only as an additional support or brace for thestructure but also as means for supporting the table top adjusting meanswhich are hereinafter more fully described, a suitable transverselydisposed cross bar 6 being arranged upon the same.

Movably positioned upon the upper or top portion of the desk body 1 is atop 7 carrying upon its underside a plurality of brackets, one of whichincludes longitudinally alined arms designated 8 while the otherincludes a plurality of radially disposed arms 1), the intermediate onehaving an enlarged web portion in which an elongated slot 10 is formed.In this connection, it will be noted that the several brackets arearranged adjacent the forward and rear sides of the table top.

Vertically disposed screw threaded rods 11 and 12 are supported upon thecross bars 6 of the intermediate portion 5 and extend through theelongated internally screw threaded hubs of beveled gears 13 and 14-,while heads or brackets 15 and 16 adapted to be received by the bracketscarried on the under side of the table top 7 are arranged on the upperends. A pin 17 is arranged upon the hcad 15 and is slidably engaged inthe elongated slot 10 of the web portion of the central bracket arm '9,While the head 16 is pivotally engaged between the longitudinally alinedarms 8 of the re maining bracket.

Boxings 18 are secured to the intermediate portion 5 and slidablyreceive the several hubs of the gears 13 and 1 1- therein. Hence,

:upon rotation of the gears 13 and 1 lthe same will be caused to raiseor lower depending upon the direction in which they are turned.

Bearing brackets 19 are supported within the cross bar 6 and rotatablysupport shafts :20 and 21. the shaft 20 extending through a bearingcollar arranged in the forward wall of the desk body 1 while th shaft 21is formed in sections, the purpose of which will be presently apparent.Gears 22 and 23 are mounted upon the adjacent extrcmities of thesectional shaft 21 and are adapted tobe engaged by a gear carried uponthe adjacent end of the shaft 20, while on the opposite extremities ofthe sections of the shaft 21, beveled gears 25 and 9.6 are 1(11OLl1'1i3-ed and are constantly in mesh with the bevel. gears 13 and 14 carriedupon the screw threaded rods 11 and 12. T he shaft 20 is slidablymounted within the bearing brackets 19 and carries thereon an adjustablestop collar 27 whereby movement of the same will be limited; a crankhandle 28 being secured to its outer end for an obvious pun pose.

To look the slidable shaft 20 in an adjusted position an annular groove29 is formed therein and is adapted to be engaged by a lip portioncarried upon one end of a lever 30 pivoted upon the forward wall of thedesk body adjacent the bearing collar as at 31, a spring being engagedwith the free end of the lever for normally forcing said lip portioninwardly.

.An arm 32 having; a screw threaded bore formed in its outer extremityis pivotally engaged with a vertically arranged rod 33 secured to theintermediate portion 5 of the desk body and serves as means for supportng a seat 3 having a screw threaded shank 35 secured to the under sideof the same. A stop collar 36 is also arranged about the vertical rod 12and is provided with a set screw 37 whereby the same can he slid on therod 33 and may be locked in various positions on the rod 12, thus,maintaming the arm 32 man adjusted position. Obviously, in addition toadjusting th stop 36 for varying the height of the seat 34, the same maybe also rotated whereupon the screw threaded shank 35 will causeadjustment thereof.

In operation. when it is desired to raise the rear side of the table top7 the slidable shaft 20 is forced inwardly until the stop collar 27engages the adjacenthearina' bracket 19. At thistime. the sear 2 lwillbe 111 mesh with the gear 23 and as a cone inane quence, upon rotationof the shaft, the rear side of the table top will be raised or lowereddue to rotation of the screw threaded hub of the gear 14- about thescrew threaded rod 11, the sliding connection between the head 15carried by the said rod and the top allowing the latter to properlyadjust itself thereon. Should it be desired to adjust the forward sideof the table top, the shaft 20 is now moved so to brine; it gear 2% intomesh with the gear Hence, upon rotation of the shaft, the screw threadedhub of the 13 arranged on the rod 12 will thereby effect the desiredadjustment of the forward side of the table top. In the event hat theuser desires to adjust the forward and rear sides of the table topcollectively the shaft 20 is now moved to a position whereat the gear524 will mesh with each of the gears 22 and 23 and is locked in suchposition by means of the lever 30, the lip portion of which engages theannular groove 29 formed in the said shaft 20. With this adjustment, itwill be appreciated by w rkers in the art, that the table top may haveits position varied to facilitate the arranging and preparation ofdrawings thereon.

The construction due to the arrangement of the various compartmentstherein also serves as an eiiicient article of furniture for filingpurposes wherein drawings, instrumen s. etc. may be kept.

lllanifestly. the construction shown is capable of considerablemodification and such mod fication as is within the scope of my claims.I consider within the spirit of my invention. 1

I claim 1. A table including a top, a plurality of vertically disposedscrew threaded rods carried by said table, brackets mounted upon theupper ends of said rods having pivotal and slidable engagement with thetop, ad-

. justing means rotatable on the rods. a sectional shaft connected tothe adjusting means, and shiftable means engan'eable with the sectionalshaft for rotating the adjustina' means independently or collectively.

2. A table includina' a top, a plurality of spaced screw threaded rodsarranged on the table. brackets carried upon the upper ends of said rodshaving; pivotal and slidahle encasement with the forward and rear sidesof the top. adjusting means rotatable on said rods. a sectional shaftmounted on the table and connected to the adjusting means. shift ablemeans enrran eable with the sectional shaft for rotatina' the adjustingmeans independently or collectively, and an adjustable pivotallysupported on the table.

3. A table including a top,' a. plurality of spaced vertically disposedscrew threaded rods arranged in hearings on said table, bracketsswivelly connected with the upp r Copies of this patent may be olotainedfor five cents each,

pivotal and slidable engagement With the top, gear mounted on the upperends of the rods, a sectional shaft carrying gears meshing With saidfirst mentioned gears, and means interconnected with the sectional shaftand shiftahle thereon for independently or collectively rotating thesame.

In testimony whereof, I aflix my signature hereto.

OTIS 0. 'WHEELER.

by addressing the Commissioner of Patents,

Washington, D. C.

